In this day and age there are a lot of men that stay home and care for the kids while the wife is the breadwinner in the family. It's not as uncommon as you might think.
Would it be possible for your husband to take some online college classes to achieve even an associates degree in a field he is interested in? Maybe that would help him obtain another position with better pay and he won't feel like he's taken a step backwards.
I hope things work out for the 2 of you
Hugssssssss
J